The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 17-70 F2.8 Di III-A VC and the Sony E PZ 18-105mm F4 G for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Tamron 17-70 F2.8 Di III-A VC is the longer of the two lenses at 119mm. The Sony E PZ 18-105mm F4 G with a length of 110mm, is 9mm shorter. On the other hand, the Sony E PZ 18-105mm F4 G has a larger diameter of 78mm compared to the Tamron 17-70 F2.8 Di III-A VC's 75mm diameter.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Sony E PZ 18-105mm F4 G weighs 482g, 8% (43g) lighter than the Tamron 17-70 F2.8 Di III-A VC's weight of 525g.
Filter Threads
The Tamron 17-70 F2.8 Di III-A VC has a filter size of 67mm whereas the Sony E PZ 18-105mm F4 G has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Tamron 17-70 F2.8 Di III-A VC:
And these are the 72mm filters that we recommend for the Sony E PZ 18-105mm F4 G:
Lens Mounts
The Tamron 17-70 F2.8 Di III-A VC has the Fujifilm X lens mount whereas the Sony E PZ 18-105mm F4 G has the Sony E lens mount. Some of the latest released cameras that are compatible with these mounts are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount and Sony ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount.
Tamron 17-70 F2.8 Di III-A VC is also available in the Sony E mount.
Focal Range
Tamron 17-70 F2.8 Di III-A VC has a focal range of 17-70mm and
4.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
25.5-105mm when used on a APS-C / DX format camera.
On the other hand, the Sony E PZ 18-105mm F4 G has a focal range of 18-105mm and 5.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-157.5mm when used on a APS-C / DX format camera.
